I did a recent upgrade of the application and various plug ins, and now the Crowd 2 SSO portion does not work as it was prior. There are no errors in the logs and everything seems to be working. Nothing has changed with my Crowd instance or the settings for authentication, so I'm at a loss as to what went wrong. Maybe there is an issue with a plug in that is conflicting with the Crowd 2 plug in? IIRC, part of the latest plug in updates for Jenkins were LDAP, and SSO was working prior to upgrading the plug ins. I don't recall what other plug ins were updated.